Demographic threats to the sustainability of brazil nut exploitation

Peres, C A., Baider, PA, Wadt, KA, Zuidema, LHO, Kainer, KA, Gomes-Silva, DAP, Salomao, RP, Simoes, LL, Franciosi, ERN, Valverde, FC, Gribel, R, Shepard, GH, Kanashiro, M, Coventry, P, Yu, DW, Watkinson, AR and Freckleton, RP (2003) Demographic threats to the sustainability of brazil nut exploitation. Science, 302 (5653). pp. 2112-2114. ISSN 0036-8075

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Abstract

A comparative analysis of 23 populations of the Brazil nut tree (Bertholletia excelsa) across the Brazilian, Peruvian, and Bolivian Amazon shows that the history and intensity of Brazil nut exploitation are major determinants of population size structure. Populations subjected to persistent levels of harvest lack juvenile trees less than 60 centimeters in diameter at breast height; only populations with a history of either light or recent exploitation contain large numbers of juvenile trees. A harvesting model confirms that intensive exploitation levels over the past century are such that juvenile recruitment is insufficient to maintain populations over the long term. Without management, intensively harvested populations will succumb to a process of senescence and demographic collapse, threatening this cornerstone of the Amazonian extractive economy.

Item Type: Article
Faculty \ School: Faculty of Science
Faculty of Science > School of Environmental Sciences
Faculty of Science > School of Biological Sciences
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Depositing User: Vishal Gautam
Date Deposited: 19 Dec 2003
Last Modified: 18 Oct 2018 15:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/17863
DOI: 10.1126/science.1091698

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